Indoor Cam Gen 1 - Can't set up.

I've owned a Indoor Cam for years purchased new with my doorbell. It's been in the cupboard for a couple of years. Now I want to set it up again, the setup process keeps failing. The App tells me I need to transfer ownership? I've completed a factory reset and tried again. I just seems to be blocked and won't complete the setup process. Any suggestions as to what to do? Nothing wrong with the cam I just don't want to throw out a perfect good item. Ring support could'nt help me other than go through the basic setup steps!